Author: Tracy Nelson Maurer

Water rushes out to sea out of nowhere. Suddenly, huge waves come crashing inland. It's a tsunami!

An earthquake shakes a snow-covered mountain. The fresh snow slides down. It's an avalanche!

Hot magma rises to the earth's surface. Smoke bursts from the volcano and lava flows out. It's a volcanic eruption!

Back in the 1800s, information travelled slowly. Who would dream of instant messages? Samuel Morse, that’s who! Who travelled to France, where the ...